Planned outage of Heywood to South East No.1 275 kV line in South Australia and Victoria regions from 11/10/2016 0700 hrs to 13/10/2016 1700 hrs

AEMO ELECTRICITY MARKET NOTICE.

This market notice is FOR INFORMATION ONLY.

The Heywood to South East No.1 275 kV line in South Australia and Victoria regions is planned out of service from 0700 hrs on 11 October 2016 to 1700 hrs on 13 October 2016. During this outage, Heywood 500/275 kV M1 transformer will be off-loaded

During this outage, a credible contingency can separate South Australia region from the rest of the NEM.

Under these circumstances, 35 MW of Raise and Lower regulation FCAS will be sourced from South Australia for the duration of this outage. In addition, consistent with AEMO existing procedures, adequate contingency FCAS lower requirements will also be sourced from South Australia at times when power transfer is from South Australia to Victoria.

Cancellation of the Reclassification of a Non-Credible Contingency Event: Tarong - Chinchilla 7183 and 7168 132 kV Lines in Queensland due to Lightnin

AEMO ELECTRICITY MARKET NOTICE

Cancellation of the Reclassification of a Non-Credible Contingency Event: Tarong - Chinchilla 7183 and 7168 132 kV Lines in Queensland due to Lightning.

Refer AEMO Electricity Market Notice 54887

There is no longer any lightning activity in the vicinity of the Tarong - Chinchilla 7183 and 7168 132 kV Lines.AEMO has cancelled the reclassification of the simultaneous trip of those circuits as a credible contingency event at 1940 hrs, 10/09/16

Manager NEM Real Time Operations

5488910 Sep 2016 18:04RESERVE NOTICE

Cancellation of the Actual (LOR2) condition in the South Australia region - 10 Sept 2016

AEMO ELECTRICITY MARKET NOTICE

Cancellation of the Actual (LOR2) condition in the South Australia region - 10 Sept 2016

Refer to AEMO Electricity Market Notice No. 54886

The Actual LOR2 condition in the South Australia Region is cancelled at 1805 hrs 10 Sept 2016

Manager NEM Real Time Operations

5488810 Sep 2016 18:03INTER-REGIONAL TRANSFER

Inter regional transfer limit variation - Vic Region - 10 Sep 2016

AEMO ELECTRICITY MARKET NOTICE

Inter regional transfer limit variation - Vic Region - 10 Sep 2016

A planned outage of the Heywood No 2 500kV Bus in the Vic region was scheduled to be completed at 1000 hrs 11 Sep 2016 .

It was completed at 1759 hrs

See NOS for details.

The following constraints were invoked for this outage

F-I-HYSES-BOTH_BLKRG_C_OSV-HYTX_M12V-HY_500BUSS-PA_VC_1

The outage constraints contain the following interconnectors on the LHS

V-S-MNSP1V-SA

Manager NEM Real Time Operations

5488710 Sep 2016 16:42RECLASSIFY CONTINGENCY

Reclassification of a Non-Credible Contingency Event: Tarong - Chinchilla 7183 and 7168 132 kV Lines in Queensland due to Lightning.

AEMO ELECTRICITY MARKET NOTICE

Reclassification of a Non-Credible Contingency Event: Tarong - Chinchilla 7183 and 7168 132 kV Lines in Queensland due to Lightning.

AEMO considers the simultaneous trip of those circuits to now be more likely.Therefore AEMO has reclassified this as a credible contingency event from 1640 hrs 10 sep 2016 until further notice.

Manager NEM Real Time Operations

5488609 Sep 2016 18:51RESERVE NOTICE

Actual LOR2 South Australia Region - 09 Sept 2016

AEMO ELECTRICITY MARKET NOTICE

Actual LOR2 South Australia Region - 09 Sept 2016

Refer AEMO Electricity Market Notice 54872

An Actual LOR2 condition is declared for the South Australia region from 1800 hrs until further notice due to the planned outage of the Heywood No.2 500 kV busbar.

If a credible contingency event occurs during this period the South Australia region would separate from the rest of the NEM and is likely to result in interruptions to power supplies.

There are sufficient capacity reserves in the South Australia region to meet electricity demand but it may not be possible to bring the required additional capacity into service in time to avoid automatic under-frequency load shedding causing power interruptions.